2016 HVAC Test and Repair Application Specifications

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1 2016 HVAC Test and Repair Application Specifications

2 HVAC Testing and Repair Measure: Performed on (2 ton and up) existing (DX) packaged or split systems - retrofit There are three separate incentive categories listed below. Special training is required to participate in the advanced diagnostic tune-up and duct test & repair measures. The following sections summarize the basic incentive requirements. Detailed program requirements are found in the HVAC test and repair technical specification measure. (See tables 1 and 2). ADVANCED DIAGNOSTIC TUNE-UP RETROFIT Advanced diagnostic tune-up consists of an air-conditioning equipment performance test-in with specialized program-approved test equipment, tune-up with repairs and a test-out, refrigerant charge and air flow verification, belt replacement, air filters change, condenser coil cleaning with a non-acidic chemical, evaporator coil cleaning (as needed), cleaning condensate drain lines, electrical connections checked and tightened, economizer functional testing, and any repairs needed to bring the system back to the manufacturer s specifications. Only one rebate per system will qualify during a five-year time period from the original date of the tune-up. Outdoor temperature must be 55 F or higher for systems with R410A refrigerant and 60 F or higher for systems with R22 refrigerant during the tune-up and repair procedure. The indoor return air plenum temperature must be 70 F or higher at the end of the test cycle. Test economizers for proper operation. The advanced diagnostic tune-up and duct test & repair measures require specialized program training in order to participate. ECONOMIZER REPAIR RETROFIT If economizer does not open or close under simulated cold or hot outdoor temperatures, a repair must be completed. A second APS HVAC Testing & Repair sticker (in addition to the one applied in Category #1) must be applied to the equipment after service is complete and the appropriate month/year holes must be punched out. DUCT TEST & REPAIR RETROFIT The duct test & repair measure uses diagnostic equipment to measure and repair duct leakage. The first step is to perform duct leakage test in to determine total leakage. If system leakage is greater than 60 CFM per ton, seal ducts until leakage is below 60 CFM per ton or until leakage is reduced by 20% of total fan flow. Measure duct leakage (test out) after sealing or repairing duct system using same test procedure as the initial test. This verifies that the required leakage reduction was achieved. Contractor must be Building Performance Institute (BPI) certified. Only ducts located in the unconditioned space qualify for the incentive. 1

3 PARTICIPATION & TRAINING REQUIREMENTS RETROFIT To participate in the HVAC Testing & Repair program, contractors must be a trade ally for the Solutions for Business program. TECHNICIAN TRAINING RETROFIT Air Conditioning Contractors of America of Arizona (ACCA-AZ) has created the Professional Air Conditioning (PAC) program to qualify and recognize companies as one of the best in the field. Technicians become certified after completing all required PAC classes. Initial training requirement 10% of all company technicians must be certified through the PAC program. Annual training requirement Each technician already certified through the PAC program must complete 12 NATE continuing education units (CEUs) and one course from the ACCA-AZ (PAC) program. Technicians must attend either the APS Residential or APS Commercial Advanced Tune-Up training. Table 1. Advanced Diagnostic Tune-Up Criteria SYSTEM TYPE For fixed orifice systems For systems with TXV All CRITERIA +/- 5 F of target superheat & +3 F/-5 F of target temp split (See Technical Guidebook) +/- 3 F of target subcooling & +3 F/-5 F of target temp split (See Technical Guidebook) Air flow >325 CFM <450 CFM per ton or +3 F/-5 F of target temp split between supply and return air (See Technical Guidebook) Table 2. Documentation Requirements (provide test-in and test-out documentation from testing tool where applicable for each system) DOCUMENTATION REQUIRED Equipment sizing calculations (for quality installation only) System size (tons) Nameplate SEER or EER or age (if available) Nameplate refrigerant quantity Target and actual superheat or subcool temps from all tests Amount of refrigerant added or removed Target and actual for supply/return temperature differentials from all tests Air flow CFM from all tests Duct leakage CFM from all tests Economizer position at simulated outside hot and cold temperatures 2

4 QUALITY INSTALLATION RETROFIT Quality installation is split into two phases. Phase I includes sizing, testing and repair activities. Phase II involves sealing ducts based on the Phase I test results. The incentive requirements are summarized as follows. Phase I 1. System sizing: Must use Air Conditioning Contractors Association (ACCA) standard calculations and provide documentation Manual N for load estimation Manual CS for system selection 2. Refrigerant Charge and Air Flow (RCAF) Perform RCAF testing (See QI Installation Standards Supplement for measurement procedures and target flow tables) Correct refrigerant charge and/or air flow to meet the criteria in Table 2 Supply all equipment pressures, subcool and superheat readings, indoor (return) dry-bulb and wet-bulb, outdoor ambient temperature, indoor coil temperature split and duct static readings for return and supply duct Phase II Contractor must be Building Performance Institute (BPI) certified Incentive is only for duct leakage and repairs can only be performed on ductwork located in non-conditioned spaces. Ducts outside the thermal envelope If leakage is >25 CFM per ton, perform Phase II duct sealing. 1. Seal ducts until leakage is below 25 CFM per ton. Leakage of up to 60 CFM per ton is allowed for major renovation projects where the ducts were not replaced. (See HVAC Test and Repair Technical Specification Manual.) Ducts inside the thermal envelope 1. If leakage is >40 CFM per ton, perform Phase II duct sealing. For larger systems, it is recommended to take pre- and post-project photos for all duct sealing and state the exact locations sealed. Documentation Requirements PROVIDE THE FOLLOWING INFORMATION FOR EACH SYSTEM Equipment sizing calculations System size (tons) Equipment model number Nameplate refrigerant quantity Target and actual superheat or subcool temps from all tests Amount of refrigerant added or removed Target and actual for supply/return temperature differentials from all tests Air flow CFM from all tests Duct leakage CFM from all tests 3

5 QUALITY INSTALLATION NEW CONSTRUCTION Quality installation is split into two phases. Phase I includes sizing, testing and repair activities. Phase II involves sealing ducts based on the Phase I test results. The incentive requirements are summarized as follows: Phase I 1. System sizing: must use air-conditioning contractor 2. Association (ACCA) standard calculations and provide documentation Manual N for load estimation Manual CS for system selection Manual Q for duct sizing 3. Refrigerant charge and air flow (RCAF) Perform RCAF testing (See HVAC Test and Repair Technical Specification Manual) 4. Correct refrigerant charge and/or air flow to meet criteria below Phase II Ducts outside the thermal envelope If leakage is >25 CFM per ton, perform Phase II duct sealing. 1. Seal ducts until leakage is below 25 CFM per ton. Leakage of up to 60 CFM per ton is allowed for major renovation projects where the ducts were not replaced. (See HVAC Test and Repair Technical Specification Manual.) 2. Measure duct leakage after sealing to verify that required leakage targets were met. Ducts inside the thermal envelope 1. If leakage is >40 CFM per ton, perform Phase II duct sealing. RCAF Criteria SYSTEM TYPE Advanced tune-up testing requirements For fixed orifice systems For systems with TXV All CRITERIA Outdoor temperature must be 55 F F for systems with R410A equipment. Outdoor temperature must be 60 F F for systems with R22 equipment. Indoor dry-bulb return air plenum must be between 70 F - 84 F during the test. Indoor wet-bulb (return) must be 50 F or higher during the test. +/- 5 F of target superheat +3 F / -5 F of target temp split (See Technical Guidebook) +/- 3 F of target subcooling +3 F / -5 F of target temp split (See Technical Guidebook) Air flow CFM per ton or +3 F / -5 F of target temp split between supply and return air (See Technical Guidebook) 4

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